NOTES AND QUERIES. 289 
NOTES AND QUERIES. 
NOTICH.—As this Journal will be suspended for 
some time, after the issue of the December Number 
and Index, Subscribers are requested to pay their 
outstanding Subscriptions at their earliest conveni- 
ence to Messrs. Brook and Chrystal, 11, Market- 
street, Manchester. 
FLOSCULARIA MUTABILIS.—This organism which Mr. Bolton 
proposes to name as above, on account of its curious habit of 
varying its trochal disc, has been sent out from Newhall-street during 
the past month. All the specimens hitherto found have been free- 
swimming. They resemble 7: campanularia, but have only two 
lobes instead of five. There is a pair of eyespots on each side of 
the longer lobe. _ Besides the stiff or radiating cilia, characteristic 
of the Floscules, it has in addition a wreath of active vibratile cilia 
round the trochal disc. It possesses a gelatinous sheath in which 
the eggs may often be seen. 
Pror. ATTFIELD’s PAPER.—Some of our readers may think, 
perhaps, we have strained a point in admitting this paper into Zhe 
Microscopical News. We have, however, thought the subject to be 
of such interest and importance, that we hope some of our readers 
will take up the debatable matter from a microscopic point of view. 
THE CELL WALLS oF Diatoms.—A very interesting paper on 
this subject appeared in the August number of the Journal of the 
Royal Microscopical Society. The “methods of investigation” 
deserve careful study. 
BELGIAN Diatoms.—Dr. H. van Heurck has published the first 
two sets of slides, illustrating his Synopsis of Belgian Diatoms. 
The specimens (fifty species) are for the most part preserved in a 
mixture of styrax and liquidambar. 
DANGERS FROM THE EXCREMENTS OF FLIEs.—Dr. Grassi has 
found that the eggs of human nematode parasites are swallowed 
by flies and afterwards deposited in the excrement. It would be 
interesting if some of our English observers would follow up these 
observations. 
La TRICHINE ET LA TRICHINOSE.—An octavo treatise of 257 
pages and 15 plates, published last year in Paris as a Government 
work, by M. J. Chatin, and which should be read by all who are 
engaged in the prevention of the spread of disease by means of 
our food supplies. 
